LT1 Based Engine Tech 1993-1997 LT1/LT4 Engine Related

no coolant crossover on heads bad?

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Old Dec 23, 2004 | 03:30 PM
  #1  
97s10ondubs's Avatar
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From: Davie, FL
no coolant crossover on heads bad?

I ask this because im in the middle of a h/c swap and my old heads do not have the coolant crossover just two plugs on the heads, they have been like that since i bought the car in march, so I do not have a pipe and was wondering if it was ok to take the plugs and put them in the new heads. If not where do I get a pipe and how much?
Old Dec 23, 2004 | 04:20 PM
  #2  
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From: Under my Car as usual :)
Re: no coolant crossover on heads bad?

Not good, do a search to find out why

-Shannon
Old Dec 23, 2004 | 04:25 PM
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From: Greater West Palm Beach, FL
Re: no coolant crossover on heads bad?

you say the heads that were on the car were plugged...I can't imagine why someone would do that. Did the car remain at normal temperature? You can get the crossover tube at any GM dealer usually between $55-$60...
Old Dec 23, 2004 | 06:01 PM
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OBE1 95Z28's Avatar
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Re: no coolant crossover on heads bad?

This pipe allows steam to be extracted from the heads...install the pipe!
Old Dec 23, 2004 | 07:09 PM
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Re: no coolant crossover on heads bad?

i ran my car without the tube for about 1 1/2 years with no problems.
Old Dec 23, 2004 | 09:02 PM
  #6  
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Re: no coolant crossover on heads bad?

It would be best to have the pipe on there. P/n for the set is on my Part Numbers page.
Old Dec 23, 2004 | 10:41 PM
  #7  
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Re: no coolant crossover on heads bad?

Originally Posted by 97s10ondubs
I ask this because im in the middle of a h/c swap and my old heads do not have the coolant crossover just two plugs on the heads, they have been like that since i bought the car in march, so I do not have a pipe and was wondering if it was ok to take the plugs and put them in the new heads. If not where do I get a pipe and how much?
I have an extra one laying around
Old Dec 24, 2004 | 06:27 AM
  #8  
97s10ondubs's Avatar
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Re: no coolant crossover on heads bad?

the car never overheated and ran at 170 maybe temp its right above 160, never gave me any trouble
Old Dec 24, 2004 | 06:34 AM
  #9  
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Re: no coolant crossover on heads bad?

Originally Posted by 97s10ondubs
the car never overheated and ran at 170 maybe temp its right above 160, never gave me any trouble

yeah, but you are getting hot spots at the rear of the heads(which is bad for valves and gaskets), the sender for the gauge is at the front of the head, the tube allows coolant to flow through the dead spot at the rear of the heads
Old Dec 24, 2004 | 06:46 AM
  #10  
97s10ondubs's Avatar
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Re: no coolant crossover on heads bad?

can i put this tube on with the heads in the car, or can i buy the fittings at a hardware store? everything is almost put back together and im not gonna take the heads off
Old Dec 24, 2004 | 07:01 AM
  #11  
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Re: no coolant crossover on heads bad?

you can do it with the heads on, but the parts are dealer only
Old Dec 24, 2004 | 11:43 AM
  #12  
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Re: no coolant crossover on heads bad?

ok well ima leave it until i get a chance to go to the stealership
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